My AVX has sudden DEC drops like below... and it just makes me want to cry...
I thought it could be the cables so I rearranged the cables but this repeatedly happens.
I use backlash compensation for DEC via PHD2.
The first picture shows normal operation. The backlash compensation overdrives the DEC just a bit but there is no problem. It settles down soon.
However, the second picture shows when the DEC drops suddenly. DEC drops a lot and then goes through a huge backlash when it recovers. Interestingly, the sudden drops only happens in one direction all the time. Downwards like this, and huge backlash as it comes back.
This has been bugging me for months and I tried leveling carefully, balancing carefully (although balancing with AVX is hard, I tried to have RA working against weight, DEC slightly heavy on one side), and tightening bolts carefully in order to avoid flexure... but this happens consistently.
I even opened up the mount and regreased the gears, re-tightened the bolts on the warms and the motor but nothing helped...
Please help... T__T
I put 80mm refractor with a dslr on AVX so reasonably light weight. Guiding equipment is 60mm guidescope with rings and QHY5L-ii-m guidecamera.
And here is the link for the PHD2 log from the most recent session. (which is typical for me)
Just one more question. With my current wide field setup, guiding error other than those drops doesn't bother me much. But do you think I can put a 6" f/6 Newtonian (14lbs) on it for imaging...?
Thanks so much for help..!
sudden DEC drop